quasar | a9fc07683b0c89a1a3cfba37fd4548e6b28ebf334dca8cf79d4edada41ece724

General

Target

Top4smm Dinero Ilimitado.zip
Size

1.1MB
MD5

bfa47aae21e145867fa2536f3adb0fbb
SHA1

b7b6eaccdf32b323421b75ad8e4e420a4527b151
SHA256

a9fc07683b0c89a1a3cfba37fd4548e6b28ebf334dca8cf79d4edada41ece724
SHA512

8ca4870f1949aaf6476b3ed18bfa5764110184242d0ae2d631b28b618cb167ec4de3267776be67a6bfd1de66e5f777fc75d25a8de2c75ef16578637f514906ae
SSDEEP

24576:+NEcxEieY4MkUNZfAzaSbhDmRsYyAo1GMvTSplXql0pDAkddsid2g4:6Ecx5UUnfW9qRU4E2lXSH0sidD4

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

azxq0ap.localto.net:3425

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes

encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
install_name
WindowsUpdate.exe
log_directory
Logs
reconnect_delay
3000
startup_key
WindowsUpdate
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral1/files/0x002800000004508b-2.dat	family_quasar
behavioral1/memory/2204-5-0x0000000000640000-0x0000000000972000-memory.dmp	family_quasar

Executes dropped EXE 3 IoCs

Processes:

Top4smm Dinero Ilimitado.exeWindowsUpdate.exeTop4smm Dinero Ilimitado.exe

pid	Process
2204	Top4smm Dinero Ilimitado.exe
2596	WindowsUpdate.exe
3708	Top4smm Dinero Ilimitado.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exeschtasks.exe

pid	Process
1944	schtasks.exe
380	schtasks.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

7zFM.exe

pid	Process
4276	7zFM.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

7zFM.exeTop4smm Dinero Ilimitado.exeWindowsUpdate.exeTop4smm Dinero Ilimitado.exe

description	pid	Process
Token: SeRestorePrivilege	4276	7zFM.exe
Token: 35	4276	7zFM.exe
Token: SeSecurityPrivilege	4276	7zFM.exe
Token: SeSecurityPrivilege	4276	7zFM.exe
Token: SeDebugPrivilege	2204	Top4smm Dinero Ilimitado.exe
Token: SeDebugPrivilege	2596	WindowsUpdate.exe
Token: SeDebugPrivilege	3708	Top4smm Dinero Ilimitado.exe

Suspicious use of FindShellTrayWindow 3 IoCs

Processes:

7zFM.exe

pid	Process
4276	7zFM.exe
4276	7zFM.exe
4276	7zFM.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

WindowsUpdate.exe

pid	Process
2596	WindowsUpdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Top4smm Dinero Ilimitado.exeWindowsUpdate.exe

description	pid	Process	procid_target
PID 2204 wrote to memory of 1944	2204	Top4smm Dinero Ilimitado.exe	94
PID 2204 wrote to memory of 1944	2204	Top4smm Dinero Ilimitado.exe	94
PID 2204 wrote to memory of 2596	2204	Top4smm Dinero Ilimitado.exe	96
PID 2204 wrote to memory of 2596	2204	Top4smm Dinero Ilimitado.exe	96
PID 2596 wrote to memory of 380	2596	WindowsUpdate.exe	98
PID 2596 wrote to memory of 380	2596	WindowsUpdate.exe	98

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\Top4smm Dinero Ilimitado.zip"
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:4276

C:\Users\Admin\Desktop\Top4smm Dinero Ilimitado.exe
"C:\Users\Admin\Desktop\Top4smm Dinero Ilimitado.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1944
- C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2596
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\WindowsUpdate.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:380

C:\Users\Admin\Desktop\Top4smm Dinero Ilimitado.exe
"C:\Users\Admin\Desktop\Top4smm Dinero Ilimitado.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3708

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Top4smm Dinero Ilimitado.exe.log

Filesize
1KB

MD5
b08c36ce99a5ed11891ef6fc6d8647e9

SHA1
db95af417857221948eb1882e60f98ab2914bf1d

SHA256
cc9248a177495f45ec70b86c34fc5746c56730af36ace98ac7eb365dbafda674

SHA512
07e62581eace395b0a9699d727761648103180c21155d84ea09140f9e1c9690705c419118545aa67a564334bbde32710225fe3aa92b0b4b4210cb91f0058b1ea

Download Submit
C:\Users\Admin\Desktop\Top4smm Dinero Ilimitado.exe

Filesize
3.2MB

MD5
74474ce327c2d8e2b74eba981a7e3249

SHA1
48544696b4ce7c96559a791efb58ec7481092454

SHA256
46ca3722c1851d6a68aea45c19e64a4c735eb236403e172422d02bbff4e35cca

SHA512
0c5b75305b19e0dcaacb9f3df556cdb136c002a5732625cb096fdd0a69e4a6a4b96507bb2948b847e2726d98e424462a237e0c0cecb1210c45cef52c7c1accc1

Download Submit
memory/2204-4-0x00007FF87F483000-0x00007FF87F485000-memory.dmp

Filesize
8KB

Download
memory/2204-5-0x0000000000640000-0x0000000000972000-memory.dmp

Filesize
3.2MB

Download
memory/2204-6-0x00007FF87F480000-0x00007FF87FF42000-memory.dmp

Filesize
10.8MB

Download
memory/2204-9-0x00007FF87F480000-0x00007FF87FF42000-memory.dmp

Filesize
10.8MB

Download
memory/2596-12-0x000000001C990000-0x000000001C9E0000-memory.dmp

Filesize
320KB

Download
memory/2596-13-0x000000001CAA0000-0x000000001CB52000-memory.dmp

Filesize
712KB

Download
memory/2596-14-0x000000001CA00000-0x000000001CA12000-memory.dmp

Filesize
72KB

Download
memory/2596-15-0x000000001CA60000-0x000000001CA9C000-memory.dmp

Filesize
240KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads